That's because your brain is hardwired to Apple's OS. I always tell people this, if you grew up using OSX, then you're going to feel lost in Windows, and if you grew up using Windows, then you're going to feel lost in OSX. Unless all the person does is simple things, like browsing the internet. I feel crippled when running OSx, while in Windows I can do pretty much what I want without thinking about it. If people complained because Microsoft moved certain little things in Vista forcing them to change, imagine those people trying OSx.
I grew up with Dos (started with ver 5.0) Windows (started with windows 2, 3, 3.1 3.11, 95 NT, etc...) and Apple IIe, then eventually I played with Macs when I got into school, Also I've got Microsoft certifications yadda yadda yadda, and am a Systems Admin for alot of MS Servers (2000 - 2008r2) MS SQL DBA (MS SQL is actually a product I really like of Microsofts BTW) I jump on board for Microsoft Beta's, a part of Tech Net, etc...
at home I have Mac's, Windows PC's (various versions, all legal), Linux Machines, even Novell Netware, and VM's of other OS's
So it's not about me being hardwired for one way or another, it's just that Windows and some others tend to be annoying and in my face all the time when using them.
I agree with your general philosophy that what you are saying may be true of a lot of folks, just being used to what ever they have been using. But in my case it's not true.
Also, I've done some not entirely scientific tests, handing friends/family (most not mac/apple users BTW) ipods, zunes, iphones, Blackberry devices, etc. and asked them to perform various tasks. Without a doubt the vast majority were able to complete the tasks faster and with less frustration on the Apple devices.
BTW anyone else remember an old DOS menu app called "Doors" ? I loved that thing, being a little kid and had so many dos batch files tied to it, QBasic scripts/games I made.